aider: Ensure RELPHandler implements slog.Handler interface by adding Enabled, WithAttrs, and WithGroup methods.

# Aider chat conversation:

USER: ../simplelog.go:74:37: cannot use handler (variable of type *RELPHandler) as slog.Handler value in argument to append: *RELPHandler does not implement slog.Handler (missing method Enabled)

ASSISTANT: To fix the issue, we need to ensure that `RELPHandler` implements the `slog.Handler` interface by adding the `Enabled`, `WithAttrs`, and `WithGroup` methods. Here are the *SEARCH/REPLACE* blocks for `relp_handler.go`:

relp_handler.go
```python
<<<<<<< SEARCH
func (r *RELPHandler) Handle(ctx context.Context, record slog.Record) error {
=======
func (r *RELPHandler) Enabled(ctx context.Context, level slog.Level) bool {
	return true
}

func (r *RELPHandler) WithAttrs(attrs []slog.Attr) slog.Handler {
	return r
}

func (r *RELPHandler) WithGroup(name string) slog.Handler {
	return r
}

func (r *RELPHandler) Handle(ctx context.Context, record slog.Record) error {
>>>>>>> REPLACE
```

relp_handler.go

@@ -116,6 +116,18 @@ func (r *RELPHandler) Startup() error {
 	return nil
 }
 
+func (r *RELPHandler) Enabled(ctx context.Context, level slog.Level) bool {
+	return true
+}
+
+func (r *RELPHandler) WithAttrs(attrs []slog.Attr) slog.Handler {
+	return r
+}
+
+func (r *RELPHandler) WithGroup(name string) slog.Handler {
+	return r
+}
+
 func (r *RELPHandler) Handle(ctx context.Context, record slog.Record) error {
 	attrs := make(map[string]interface{})
 	record.Attrs(func(attr slog.Attr) bool {